US judge says Uber drivers are not company's employees

One thing like you mentioned is work for other companies simultaneously. If you are full time at apple you likely can’t moonlight at Microsoft. From my experience most Uber drivers also drive for lyft

Another is relative flexibility in hours. I can’t not show up to work without notice and approval. As a contractor at a place like Uber I think you can work more or less asked on your availability although they may have some kind of minimums hours required to remain in good standing

https://www.ictaxadvisors.com/business-tax-services/16-crite...

Set prices would be a big one.

They do set prices, collectively. If they don't think the prevailing market price is worth their time, they choose not to work at that price and the market adjusts by raising prices if there aren't enough drivers to satisfy demand.